You also need to remember the direction of the material fibres, as the values change if the bend takes place along the fibres, or transversely. DX51) this corresponds to the value of 0.50.ДЄlso note that the value of the coefficient c, based on experimental data, will vary depending on the orientation of the sheet compared to the direction of sheet rolling. c is a coefficient that depends on the type of material and the conditions of the bend.ДЇor low carbon steel from cold forming (e.g.These values are determined by the degree of deformation of the external fibres of the sheet, and depend on its thickness.Дetermining the minimum bend radius (ri) is particularly important.Д«ased on experimental data, the minimum bend radius (ri) can be determined as follows: It is important not to fall below certain values for the bend radius. Under ideal conditions this axis would be halfway, in the thickness this condition occurs with a ri/s ratio above 2 (ri/s>2) however, where the ratio is less than or equal to 2 (ri/s<= 2), the neutral axis shifts to approximately one-third of the thickness, towards the inside of the bend, which leads to greater straightening on the external fibres of the material, consequently thinning the thickness leading to the possibility of breakage. As the greatest strain during the bend is borne by the fibres of the material on the outermost corner of the bend, this strain is all the greater, the lower the ri/s ratio this is due to the shifting of the neutral axis along which the fibres of the material are not deformed, and which divides the part of the thickness where the material fibres are being straightened, from where they are compressed. The relationship between the bend radius (ri) and the sheet thickness (s).To obtain the required bend angle, the elastic return must be suitably compensated during the bending process. This strongly depends on the relationship between the bend radius and the sheet thickness (ri/s), the characteristics of the material, (particularly the elastic module and yield limit) and the influence of the previous plastic deformation processes. The elastic return of the material after the bend.Points to consider during the bending process: To optimise the control of the bending process, you need to carefully manage all the parameters that make up the final quality of the bend, by correctly evaluating the overall strain and deformation created within the bent components. Successful bending depends on many variables related to the characteristics of the material and the machine set-up. These two values can be deduced from a tensile test which is used to understand the behaviour of materials, and their mechanical properties. Plastic deformation occurs when the material is placed under a load that lies between the yield limit and the breaking load. This type of permanent deformation of sheet metal is done by placing the material under strain, which exceeds its maximum elasticity.Д«ending generally produces permanent deformations in limited areas of the sheet, particularly in areas where the aim is to modify the shape of the sheet. The process of sheet bending is one of the most common industrial processes of plastic deformation it exploits the materialвЂ™s capacity of resistance, before reaching breaking point. One of these factors is the minimum bend radius. Successful bending depends on various factors. It involves changing the shape of a sheet by bending it, generating permanent deformation. Do you know the minimum radius to use for sheet bending?Д«ending is one of the most common ways of processing metal.

Sheet metal bend table